MAX1472 Datasheet, PDF (3/9 Pages) Maxim Integrated Products – 300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter

300MHz-to-450MHz Low-Power, Crystal-Based
ASK Transmitter
ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, output power is referenced to 50Ω, V_DD = 2.1V to 3.6V, V_ENABLE = V_DD, T_A = -40°C to +125°C, unless
otherwise noted. Typical values are at V_DD = 2.7V, T_A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
PHASE-LOCKED LOOP PERFORMANCE
VCO Gain
Phase Noise
Maximum Carrier Harmonics
Reference Spur
Loop Bandwidth
f_RF = 315MHz
f_RF = 433MHz
f_RF = 315MHz
f_RF = 433MHz
f_RF = 315MHz
f_RF = 433MHz
f_OFFSET =100kHz
f_OFFSET = 1MHz
f_OFFSET =100kHz
f_OFFSET = 1MHz
Crystal Frequency
f_XTAL
Oscillator Input Impedance
From each XTAL pin to GND
Frequency Pushing by V_DD
Maximum Crystal Inductance
DIGITAL INPUTS
Data Input High
V_IH
Data Input Low
V_IL
V_DD- 0.25
Maximum Input Current
Pulldown Current
TYP
330
-84
-91
-82
-89
-50
-50
-75
-81
1.6
f_RF / 32
6.2
3
50
2
25
MAX
0.25
UNITS
MHz/V
dBc/Hz
dBc
dBc
MHz
MHz
pF
ppm/V
nH
V
V
nA
µA
Note 1: 100% tested at T_A = +25°C. Guaranteed by design and characterization over temperature.
Note 2: 50% duty cycle at 10kHz data.
Note 3: Guaranteed by design and characterization, not production tested.
Note 4: Generally limited by PC board layout.
Note 5: V_ENABLE < V_IL to V_ENABLE > V_IH. f_OFFSET is defined as the frequency deviation from the desired carrier frequency.
Note 6: V_ENABLE > V_IH, V_DATA > V_IH, Efficiency = P_OUT/(V_DD x I_DD).
Note 7: V_ENABLE > V_IH, DATA toggled from V_IL to V_IH, 10kHz, 50% duty cycle, Efficiency = P_OUT/(V_DD x I_DD).
Note 8: Output power can be adjusted with external resistor.
Note 9: Guaranteed by design and characterization at f_RF = 315MHz.
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